Fig. 4
Four IRDIS reductions of HD 4747. Panel a: IRDIS reduction using median combine only. Panel b: IRDIS reduction using radial-profile subtraction. Panel c: IRDIS reduction using ADI (TLOCI). Panel d: IRDIS reduction using SDI and simple derotation. The companion is observed in each reduction. The north and east directions and the scale are indicated in image (a).
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